Make files in link list draggable

api/js/etemplate/Et2Link/Et2LinkList.ts

@@ -207,14 +207,58 @@ export class Et2LinkList extends Et2LinkString
 	protected _rowTemplate(link) : TemplateResult
 	{
 		return html`
-            <div id="${this._get_row_id(link)}"
-                 @mouseover=${this._handleRowHover}
+            <div id="${this._get_row_id(link)}" draggable="${link.app == 'file'}" 
+                 @dragstart=${this._handleDragStart.bind(this, link)}
+				 @mouseover=${this._handleRowHover}
                  @mouseout=${this._handleRowHover}
                  @contextmenu=${this._handleRowContext}>
                 <slot name="${this._get_row_id(link)}"></slot>
             </div>`;
 	}
 
+	/**
+	 * Handle dragstart event for dragging out a file
+	 *
+	 * @param _data
+	 * @param _ev
+	 * @protected
+	 */
+	protected _handleDragStart (_data, _ev)
+	{
+		// // Unfortunately, dragging files is currently only supported by Chrome
+		if(navigator && navigator.userAgent.indexOf('Chrome') >= 0) {
+
+			if (_ev.dataTransfer == null) {
+				return;
+			}
+			if (_data && _data.type && _data.download_url) {
+				_ev.dataTransfer.dropEffect = "copy";
+				_ev.dataTransfer.effectAllowed = "copy";
+
+				let url = _data.download_url;
+
+				// NEED an absolute URL
+				if (url[0] == '/') url = egw.link(url);
+				// egw.link adds the webserver, but that might not be an absolute URL - try again
+				if (url[0] == '/') url = window.location.origin + url;
+
+				// Unfortunately, dragging files is currently only supported by Chrome
+				if (navigator && navigator.userAgent.indexOf('Chrome')) {
+					_ev.dataTransfer.setData("DownloadURL", _data.type + ':' + _data.title + ':' + url);
+				}
+
+				// Include URL as a fallback
+				_ev.dataTransfer.setData("text/uri-list", url);
+			}
+
+			if (_ev.dataTransfer.types.length == 0) {
+				// No file data? Abort: drag does nothing
+				_ev.preventDefault();
+				return;
+			}
+		}
+	}
+
 	/**
 	 * Handle show/hide delete button
 	 * @param _ev